@B35: These Q35 short-turns would drop people off at Kings Plaza and dead-head to Avenue S, right? Or would it end at Avenue S?
About the Q52 to Far Rockaway, I dunno, is it needed? Playing devil's advocate here, but the deadhead distance for the Q52 would go up a lot and the route in general would become pretty long. Is it really bringing anything to the table the isn't already? I mean, the Q53 takes just about the same time as the shuttle to get to Broad Channel from 116th St and actually goes somewhere, but from Far Rockaway the Q22 to the Q21 takes almost twice as long as the [12 mins vs. 25 mins, not including wait time transferring between the Q22 and Q21, and the bus would probably take even longer during busier travel periods anyway...] The Q52 would be somewhat faster, but are people really going to take the bus when they could take the faster train instead? I do have to say, the idea of a faster trip on the Eastern end of the peninsula could prove to be kinda popular.
How frequent will the Q52 be anyway? Right now the Q21 LTD is 15 minutes during Peak Rush Hour and the Q21 Local is all day, every day. We have no indication as to how fequent the Q52 will be, except that there will be "minor schedule adjustments" to the Q11 and Q53. Personally, I don't think there will be too much change compared to current Q21 service to Arverne.
I do think a Q53 Express could work in tandem with the current 52 and 53, but I don't know if it could its own weight all-year long or just during summer.